Παραπομπή σε μορφή APA (7η εκδ.)

Gaul, W., & Schader, M. (1986). Classification as a tool of research: Proceedings of the 9th Annual Meeting of the Classification Society, University of Karlsruke, F.R.G., 26-28, 1985. North-Holland.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Gaul, W., και M. Schader. Classification as a Tool of Research: Proceedings of the 9th Annual Meeting of the Classification Society, University of Karlsruke, F.R.G., 26-28, 1985. Amsterdam: North-Holland, 1986.

Παραπομπή σε μορφή MLA (9th εκδ.)

Gaul, W., και M. Schader. Classification as a Tool of Research: Proceedings of the 9th Annual Meeting of the Classification Society, University of Karlsruke, F.R.G., 26-28, 1985. North-Holland, 1986.